I'm in area 3800 (I'm not sure if this is area specific; I've just turned on the scripts). I have Viconia and Jaheira in the party. When either of them have a priest script (druid offensive/defensive for Jaheira, Cleric aggressive for Viconia), the game crashes the moment I am in battle and turn AI on. I've verified that these are the scripts responsible for the crash - if I change them to standard attack and/or ranged, there is no crash.
This is new for v6. I didn't see this behavior with v4 and the fixpack. This is a fresh install. I have cleric remix installed last, but I doubt this is the problem because it is not limited to the cleric (it happens with Jaheira's script as well).